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. 2019 Jun 28;39(6):BSR20182356. doi: 10.1042/BSR20182356

Table 1. Patient demographics and risk factors in RA.

Variable Cases (n=574) Controls (n=804) P
Age (years) 54.5 ± 15.1 55.7 ± 10.1 0.080
Female/male 427/147 599/205 0.962
Onset age (years) 45.6 ± 12.9
Disease duration (years) 8.9 ± 9.2
Treatment duration (years) 7.6 ± 7.8
RF-positive 456 (79.4%)
ACPA positive 300 (52.2%)
CRP-positive 323 (56.3%)
ESR (mm/h) 33.7 ± 25.2
DAS28 4.3 ± 1.5
Functional class
I 73 (12.7%)
II 256 (44.6%)
III 209 (36.4%)
IV 36 (6.3%)

Abbreviations: CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; DAS28, RA disease activity score; RF, rheumatoid factor.

HHS Vulnerability Disclosure